--- contrib/libs/protobuf/src/google/protobuf/stubs/common.h	(224e5c6eb476648794a67b47aa67ced218b4043c)
+++ contrib/libs/protobuf/src/google/protobuf/stubs/common.h	(4a96e633c1c4d449c2c2adfe068664805ccccfda)
@@ -147,6 +147,8 @@ PROTOBUF_EXPORT void ShutdownProtobufLibrary();
 
 namespace internal {
 
+PROTOBUF_EXPORT bool IsStructurallyValidUTF8(const char* buf, int len);
+
 // Strongly references the given variable such that the linker will be forced
 // to pull in this variable's translation unit.
 template <typename T>